The particular form of argument from ignorance commonly used by Intelligent Design advocates is often called "God of the Gaps." They typically say that there is no natural explanation for X phenomenon, therefore we must accept a supernatural explanation (i.e., a Creator). For some phenomena cited, scientists counter that they indeed do have a natural explanation. For other phenomena, the gap in scientific knowledge does not mean that science will
never have a natural explanation.
Religion used to be a source of understanding about the natural world. However, as science developed, it has become accepted as the best way we have of understanding the natural world. The work of science is not complete, and it never will be. Those who insist that religion provides superior understanding of the natural world have retreated from areas in which knowledge has been gained to areas in which a lot of research remains to be done. The picture these religious fundamentalists paint is not of a God who presents himself for all to see and astonishes beholders with feats of power, but instead of a God who hides in the shadows, a silent hermit, except for occasional appearances in a burrito or a grilled cheese sandwich (
http://www.beliefnet.com/Entertainment/Books/2010/02/Jesus-in-Food-and-Other-Objects.aspx).